marginfix and letter class

Question

One of the things I like about the letter class is that it vertically centers 1 page letters on the page. I recently discovered the marginfix package, but it seems to prevent the centering behavior.

\documentclass{letter}
\usepackage{lipsum}
\usepackage{marginfix}
\begin{document}
    \begin{letter}{}
    I like to use marginals for editing notes.\marginpar{FIX THIS}

        \lipsum[1-2]
    \end{letter}
\end{document}

The letter is not vertically centered when marginfix is used.

I can get the centering back with \def\MFX@attachmargin{}, but I am pretty sure that defeats the purpose of loading marginfix. Is there a way to make marginfix and vertical centering compatible?

Answer 1

Taking a quick look at the code, marginfix messes with the output routine. That means that 'all bets are off', so I'd say the answer here is 'no'.